JPS5840805Y2 - Response plate for automatic plowing depth adjustment mechanism for passenger tractors - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of the response plate in the automatic plowing depth adjustment mechanism of a riding tractor. When performing tillage work while automatically adjusting the tilling section, when the hydraulic lever is manually rotated forward and tilted outward in order to lower the tilling section of the riding tractor, the hydraulic lever engages the notch provided in the response plate. It is an object of the present invention to provide an improved response plate which can be securely fitted and locked to the plowing depth, thereby easily switching from manual to automatic plowing depth adjustment state.

In the present invention, the automatic plowing depth adjustment mechanism includes a sensing and transmitting device that will become clear in the detailed description below, a response device that will become clear in the detailed description below, and an inner wire that connects the two devices to each other. It consists of two Bowden wires.

When a passenger tractor equipped with such an automatic plowing depth adjustment mechanism completes the specified tilling work on the outward trip, the worker operates the steering wheel to turn the machine, and then starts tilling on the return trip again. In this case, when the worker manually moves the hydraulic lever backwards and releases the hydraulic lever, the tiller lift mechanism is activated and the tiller moves upward along with the lift arm.

Therefore, the worker moves the machine forward and at the same time manually moves the hydraulic lever forward to lower the tiller, and at the same time tilts the hydraulic lever outward to engage the notch in the response plate. By engaging the hydraulic lever, it is necessary to switch from manual to automatic plowing depth adjustment state and continue tilling work.

However, in reality, it often takes time to match the notch in the response plate with the longitudinal position of the hydraulic lever, and it is not easy to lock the hydraulic lever in the notch.

The present invention has been developed in view of the above-mentioned circumstances and to achieve the above-mentioned object of the present invention.
This is improved by forming a stopper to stop the forward rotation of the hydraulic lever.

Hereinafter, a riding tractor equipped with an automatic plowing depth adjustment mechanism having an improved response plate according to the present invention will be described in detail with reference to the drawings.

The illustrated riding tractor is equipped with a prime mover 1, a steering wheel 2, a seat 3, a transmission housing 4, etc., and has a tiller suspended on its side by a hydraulic tiller lifting mechanism so that it can be raised and lowered.

The tilling section elevating mechanism is composed of main members such as a hydraulic valve 5, a lift arm 6, a connecting rod 7, and a hitch 8.

In addition, the tilling section includes a front frame 41 from which a king pin 9 pivotally attached to the hitch 8 protrudes, a tilling blade 10, and this tilling blade 1.
Chain case 11 that transmits power to 0, tilling cover 1
2. A rear beam 14 pivotally supported on the upright upper end 13 of the tilling cover 12, a tilling depth adjuster 15 provided between the tilling cover 12 and the rear beam 14, and a tilling depth adjuster screw 15 provided between the tilling cover 12 and the rear beam 14. 15 rotation: It is composed of main members such as the handle 16 and the leveling plate 17 rotatably supported at the rear end of the tilling cover 120.

The tilling section configured in this way is raised and lowered by vertical movement of the lift arm 6 in the tilling section elevating mechanism.

Reference numeral B indicates a sensing and transmitting device installed in the tilling section of the riding tractor, and this sensing and transmitting device B includes a frame 20 fixed to a face plate 19 provided at the rear end of the rear beam 14; The transmitter 21 is rotatably supported on a rotary shaft 23 provided on the frame 20, and the lower end of the leveling plate 17 is rotatably supported on the rear end of the tilling cover 120, extending rearward. A ground plate 18 formed to be in contact with the cultivated ground, and a sensing tool 22 whose upper end is rotatably connected to the horizontal extension of the transmitter 21 and whose lower end is rotatably connected to the ground plate 18, and is extendable and retractable.
The sensing tool 22 senses the amount of vertical movement of the ground plate 18, and the transmitter 21 emits a signal.

Reference numeral A indicates a response device installed in the tilling section elevating mechanism of the riding tractor. a frame body 39, a pin 29 fixed to the frame body 39 so as to be orthogonal to the valve opening/closing shaft 27, and a hydraulic pressure fixed to the frame body 39 so as to be tiltable in the axial direction of the valve opening/closing shaft 21 using the pin 29 as a support shaft. The lever 28 and a notch 3 which is arranged in parallel with the valve opening/closing shaft 27 on the outside of the hydraulic lever 28 and is loosely fitted into the valve opening/closing shaft 27, and into which the hydraulic lever 28 is fitted and locked into the bent portion of the upper edge.
3, a plate 40 extending upwardly and fixed at the side end of the frame 39, and a plate 40 fitted between the plate 40 and the sliding hydraulic lever 28. The hydraulic lever 28 is fitted and locked into the notch 33 by the elastic force of the ammunition 30, and the valve opening/closing shaft 21 is rotated integrally with the rotation of the response plate 31. It rotates and automatically adjusts the plowing depth.

On the other hand, during manual operation, the hydraulic lever 28 is manually operated to
After removing it from the notch 33 against the bias of 0, the tilling section is moved up and down by operating it back and forth.

24 and 24' are upper and lower transmitter pins, respectively, which are installed on the transmitter 21 at equal intervals around the rotation axis 23.

Reference numerals 32 and 32' designate upper and lower response pins, which are installed on the response plate 31 at equal intervals around the valve opening/closing shaft 27.

25.25' are Bowden wires provided so as to cross each other, and the Bowden wires 25.25'
Inner wires 26 and 26' are inserted through the upper transmitter pin 24 and the lower response pin 32', and the lower transmitter pin 24' and the upper response pin 32 are connected by the inner wire 26'. are connected by an inner wire 26.

In addition, 36 is a response frame, the front part of which fits loosely into the valve opening/closing shaft 27, and the rear part serving as an upright plate 37.
Bowden wire 25.25' is attached.

38 is a bolt for fixing the response frame 36 to the aircraft body.

As is clear from the above description, the automatic plowing depth adjustment mechanism according to the present invention is a Bowden wire b in which the response device A and the sensing and transmitting device B intersect with each other.

They are connected via inner wires 26 and 26' inserted into the sensing and transmitting device B, and are configured so that signals from the sensing and transmitting device B are interlocked with the responding device A.

Here, to explain the improved response plate 31 according to the present invention, the response plate 31 has a front edge 34 of a cutout 33 provided in the response plate 31 projected and extended to lock the forward rotation of the hydraulic lever. A stopper 35 is formed to prevent the child from falling.

Hereinafter, the operating state of the automatic plowing depth adjustment mechanism equipped with the improved response plate 31 according to the present invention and the effects of the response plate 31 will be described in detail.

A prime mover 1 of a riding tractor is started, a tilling blade 10 is rotated to try tilling, and a tilling depth adjusting screw 15 is operated to set an appropriate tilling depth.

After that, with the ground plate 18 of the leveling plate 17 in contact with the cultivated field, the length of the sensing tool 22 connecting the ground plate 18 and the transmitter 21 is adjusted so that the horizontal extension of the transmitter 21 becomes horizontal. Adjust the length.

The tilling blade 10 is then rotated to carry out the tilling work while moving the riding tractor forward.However, due to the unevenness of the cultivated land and the hardness and softness of the soil, the tractor moves up and down.
The plowing depth is constantly changing, becoming deeper and then shallower.

In this case, as the aircraft moves up and down, the ground plate 18 moves up and down, and the sensing device 22 senses the amount of upward and downward movement of the ground plate 18 and transmits it to the transmitter 21. body 2
1 will rotate it up and down.

The upward and downward movements of the transmitter 21 are made by Bowden wire 25.5
The hydraulic pressure is transmitted to the response plate 31 via the inner wires 26 and 26', and the hydraulic lever 28 rotates backward and forward together with the response plate 31.

At this time, when the plowing depth becomes deeper, the hydraulic lever 28 rotates backward from the neutral position, so the hydraulic valve 5 operates, the lift arm 6 rotates upward, the tilling section is lifted, and the plowing depth becomes shallower. When the plowing depth is restored and the ground plate 18 is lowered, the hydraulic lever 28 automatically returns to the neutral position, and the plowing depth adjustment is completed.

Further, when the tilling depth becomes shallow, contrary to the above, the downward rotation of the transmitter 21 is transmitted to the response plate 31, the hydraulic lever 28 is rotated forward, the tilling section is lowered, and the tilling depth is increased. is adjusted so that it becomes deeper.

When the plowing depth is restored, the ground plate 18 rises and the hydraulic lever 2
8 automatically returns to the neutral position, and the adjustment of the plowing depth is completed.

However, when continuing the tilling work while reciprocating in the field, when the forward work is completed, the hydraulic lever 28 is manually removed from the notch 33 and rotated backward to greatly raise the tilling section. Turn the machine to face the return route, then manually rotate the hydraulic lever 28 forward to lower the tilling section, manually insert and lock the hydraulic lever 28 into the notch 33, and the tiller will automatically start plowing. It is necessary to switch to the original state where the depth is adjusted, but in actual manual operation, the hydraulic lever 28 may be pushed too far forward or not pushed enough, and the fit between the hydraulic lever 28 and the notch 33 may be incorrect. It takes time to lock the tractor, and the passenger tractor often moves forward while the response device A receives a command to deepen the plowing depth, and the plowing depth gradually becomes deeper until the prime mover 1 stops rotating due to the load. There are even things you can do.

However, in the present invention, the automatic plowing depth adjustment mechanism is provided with an improved response plate 31, so that when the worker manually moves the hydraulic lever 28 forward, the worker can move the hydraulic lever 28 in the same position. Simply rotate the hydraulic lever 2B forward from the neutral position, contact the stopper 35, and tilt the hydraulic lever 28 outward, or release the hydraulic lever 28 from your hand when the hydraulic lever 28 contacts the stopper 35. The hydraulic lever 28 can be automatically fitted and locked into the notch 33 by the elastic force of the machine 30, and the state of automatic plowing depth adjustment can be reliably achieved.

Therefore, the worker does not need to look at the notch 33,
There is no danger in operation, there is no inconvenience such as rotation stoppage due to overload of the prime mover 1, and the hydraulic lever 2B can be rotated forward without hesitation, and the hydraulic lever 28
It has the advantage of being able to exhibit a number of excellent effects, such as eliminating the problem of overkilling or underkilling.

[Brief explanation of the drawing]

FIG. 1 is a side view of a riding tractor equipped with an automatic plowing depth adjustment mechanism equipped with a response plate according to the present invention, and FIG. 2 is an explanatory diagram for explaining the connection state between the sensing and transmitting device and the response device. FIG. 3 is a sectional view of the response device, and FIG. 4 is a plan view of the response board. In these drawings, 'A is a response device, B is a sensing and transmitting device, 28 is a hydraulic lever, 30 is a bomb, 31 is a response plate,
33 is a notch, 34 is a front edge, and 35 is a stopper.

Claims (1)

[Scope of utility model registration request] The sensing and transmitting device B installed in the tilling section of the riding tractor consists of a frame 20 fixed to a face plate 19 provided at the rear end of the rear beam 14, and a rotation shaft 2 provided on the frame 20.
3, and the lower end of the leveling plate 17, which is rotatably supported on the rear end of the tillage cover 12, are formed so as to extend rearward and come into contact with the already cultivated ground. ground plate 1
8, and a sensing tool 22 whose upper end is rotatably connected to the horizontal extension of the transmitter 21 and whose lower end is rotatably connected to the ground plate 18, and which is extendable and retractable. The amount of vertical movement is sensed and transmitted by the transmitter 21, and the response device A provided in the tiller lifting mechanism is a frame fixed to the valve opening/closing shaft 27 extending from the hydraulic valve 5. body 39, a pin 29 fixed to the frame 39 so as to be orthogonal to the valve opening/closing shaft 27, and a hydraulic lever 28 fixed so as to be tiltable in the axial direction of the valve opening/closing shaft 27 using the pin 29 as a support shaft. and a response plate 31 which is disposed parallel to the valve opening/closing shaft 27 on the outside of the hydraulic lever 28 and is provided with a notch 33 in which the hydraulic lever 28 is fitted and locked in the bent portion of the upper edge. At the side end of the frame 390,
It is composed of a plate 40 that extends upward and is fixed, and a bullet 30 that is fitted between the plate 40 and the hydraulic lever 28, and the hydraulic lever 28 is cut out by the elastic force of the bullet 30. 33 so that the valve opening/closing shaft 27 is rotated integrally with the rotation of the response plate 31, and the lower starting pin 24' erected on the transmitter 21 and the response plate 3
The upper response pin 32 erected on the transmitter 21 is connected with the inner wire 26, and the upper transmitter pin 24 erected on the transmitter 21 and the lower response pin 32' erected on the response plate 31 are connected by the inner wire 26. A response plate 31 in an automatic plowing depth adjustment mechanism for a riding tractor, in which the plowing depth is automatically adjusted by connecting the two with an inner wire 26' and interlocking the signal from the sensing and transmitting device B to the response device A. The response board 3
1 is an automatic plowing depth adjustment for a riding tractor, characterized in that a stopper 35 for locking forward rotation of a hydraulic lever 28 is formed by protruding the front edge 34 of a notch 33 provided therein. A response board in a mechanism.